Rainforest Sustainability

Tropical Rainforests around the world are under threat from multiple causes. The Amazon, Congo and Indonesian rainforests are all examples of rainforests under threat to some degree. The problems include deforestation, agriculture and mining, all causing changes to their environment and are ultimately unsustainable. Probably the best way the tropical rainforests can be protected is … Read more

Water Supply

The Colorado River Key: 1) The Hoover Dam 2) Lake Mead 3) City:Phoenix 5) City:San Diego 6) Lake Powell The Colorado river and the all-american canal in the South-West of the USA is an excellent example of a water resource being managed. California, a neigbouring state to Arizona and Nevada, has a very high demand … Read more

Food Supply

There is enough food grown in the world to feed the entire population the problem is that not everyone has equal access to this food. Basic Population When a country has very little resources relative to its high population size then the standard of living in that country decreses, this is called overpopulation. Equally if … Read more

Core & Periphery Model

The core-periphery model was developed in 1963 by John Friedmann and it identifies the spatical distances from the core. The core-periphery model works on many scales, from towns and cities, to a global scale. Facts about Brazil: Capital City: Brasilia It contains the second longest river in the world. It contains the largest rainforest in … Read more

Showing Equality

Lorenz Curve The Lorenz curve is a graphical representation of the distribution or equality of something. The straight line from (0,0) to (100,100) shows perfect equality, whereas the line from (0,0) to (0,100) shows perfect inequality. The line drawn between these two lines is the actual measurement. The graph (shown above) shows the distribution of … Read more

Rostow Stages Of Development

Rostow’s Model Rostow’s ‘stages of economic growth’ model shows five crutial stages in the development of a country. The first stage in the model is traditional society, this is where the countries’ population use primitive technology and their trade is still based on bartering. The second stage, names preconditions for take-off, means the country has … Read more

Development Indicators

The UNDP (UN development programme) describes development as: ‘the three essentials of development include the ability to lead a long and healthy life, to acquire knowledge, and to have a decent standard of life’. Some people also believe that the political health of a country is an important factor in its development, which includes freedom … Read more

Seasonal Variation

Seasons on the Earth surface are the result of yearly revolutions of the Earth around the Sun in combination with the tiltiture of the Earth creating differences in heat distribution. During summer in the northen hemisphere the weather it at its warmest because the Sun is directly overhead at the tropic of cancer. Whereas in … Read more

Atmospheric Circulation

The Earth and its atmosphere are both controlled primarily by the Sun and they make up an interconnected global system. Different climatic areas are the result of atmospheric movements (see the tricellular model below) within this global system. The cause of these atmospheric movements is the difference in temperature between equatorial regions and polar regions, … Read more